├── .gitignore
├── README.md
└── k


/.gitignore:
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1 | .vscode


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/README.md:
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 1 | # Automatically run the correct version of kubectl every time
 2 | 
 3 | This script will read the version of the Kubernetes server you are running. It will then download a new version of kubectl if needed and run your command with new kubectl. I named it `k` since most everyone appears to alias `kubectl` to `k` anyway.
 4 | 
 5 | ![So Simple](https://media.giphy.com/media/3o6Zt16nOfEI0C9sPu/giphy.gif)
 6 | 
 7 | ## Getting Started
 8 | 
 9 | Download the file to somewhere in your path. Any time you would call `kubectl ...`, call `k ...` instead.
10 | 
11 | `curl -OL https://raw.githubusercontent.com/jakepearson/k/master/k && chmod +x k`
12 | 


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/k:
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  1 | #!/usr/bin/env bash
  2 | set +xe
  3 | 
  4 | # DEBUG
  5 | # true => verbose (`set -xe`)
  6 | # <anything_else> => nothing
  7 | DEBUG=${DEBUG:-false}
  8 | 
  9 | if [[ "$DEBUG" == "true" ]];
 10 | then
 11 |   set -xe
 12 |   echo "Enabled verbose logging."
 13 | fi
 14 | 
 15 | 
 16 | KX_PATH="${KX_PATH:-$HOME/.kx}"
 17 | mkdir -p "$KX_PATH/cache"
 18 | 
 19 | case "$OSTYPE" in
 20 |   *arwin*)
 21 |     OS="darwin"
 22 |     ;;
 23 |   *in32* | *indows*)
 24 |     OS="windows"
 25 |     ;;
 26 |   *)
 27 |     OS="linux"
 28 | esac
 29 | 
 30 | # Attempt to load the server version from cache
 31 | if [ -n "$KUBECONFIG" ]; then
 32 |   if [ "$OS" == "darwin" ]; then
 33 |     KUBECONFIG_HASH=$(echo "$KUBECONFIG" | shasum -a 256 | cut -c1-5)
 34 |   else
 35 |     KUBECONFIG_HASH=$(echo "$KUBECONFIG" | sha256sum | cut -c1-5)
 36 |   fi
 37 |   VERSION_CACHE_FILE="$KX_PATH/cache/$KUBECONFIG_HASH"
 38 |   TARGET_VERSION=$(cat "$VERSION_CACHE_FILE" 2> /dev/null)
 39 | fi
 40 | 
 41 | # Use Correct CPU Architecture
 42 | CPU_ARCHITECTURE=$(uname -m)
 43 | case $CPU_ARCHITECTURE in
 44 |   armv5*) CPU_ARCHITECTURE="armv5";;
 45 |   armv6*) CPU_ARCHITECTURE="armv6";;
 46 |   armv7*) CPU_ARCHITECTURE="arm";;
 47 |   aarch64) CPU_ARCHITECTURE="arm64";;
 48 |   x86) CPU_ARCHITECTURE="386";;
 49 |   x86_64) CPU_ARCHITECTURE="amd64";;
 50 |   i686) CPU_ARCHITECTURE="386";;
 51 |   i386) CPU_ARCHITECTURE="386";;
 52 | esac
 53 | 
 54 | # Ensure we have at least 1 kubectl version
 55 | #
 56 | # This is used to make it easier to get the server version, which
 57 | # is an API that rarely changes... at least that is the hope
 58 | KNOWN_VERSION="$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)"
 59 | LOCAL_KUBECTL=$KX_PATH/kubectl-$KNOWN_VERSION
 60 | if [ ! -f "$LOCAL_KUBECTL" ]; then
 61 |   curl -L -o "$LOCAL_KUBECTL" "https://storage.googleapis.com/kubernetes-release/release/$KNOWN_VERSION/bin/$OS/$CPU_ARCHITECTURE/kubectl" > /dev/null 2>&1
 62 |   chmod +x "$LOCAL_KUBECTL"
 63 | fi
 64 | 
 65 | # Get the server version from the server if not cached
 66 | if [ -z "$TARGET_VERSION" ]; then
 67 |   TARGET_VERSION=$($LOCAL_KUBECTL version -o json | jq -r '.serverVersion.gitVersion')
 68 |   if [ -z "$TARGET_VERSION" ] || [ "$TARGET_VERSION" == "null" ]; then
 69 |     echo "Unable to get version information from cluster"
 70 |     exit 1
 71 |   fi
 72 |   # watch out for different non-stable release versions
 73 |   if echo "$TARGET_VERSION" | grep -E "alpha|beta|rc" > /dev/null 2>&1
 74 |   then
 75 |     TARGET_VERSION=$(echo $TARGET_VERSION | cut -d'.' -f1-4)
 76 |   else
 77 |     TARGET_VERSION=$(echo $TARGET_VERSION | cut -d'.' -f1-3)
 78 |   fi
 79 | 
 80 |   # watch out for the custom EKS version
 81 |   if echo "$TARGET_VERSION" | grep -E "eks" > /dev/null 2>&1
 82 |   then
 83 |     TARGET_VERSION=$(echo $TARGET_VERSION | cut -d'-' -f1)
 84 |   fi
 85 | fi
 86 | 
 87 | # Fill the cache if possible
 88 | if [ -n "$KUBECONFIG" ]; then
 89 |   echo "$TARGET_VERSION" > "$VERSION_CACHE_FILE"
 90 | fi
 91 | 
 92 | TARGET=$KX_PATH/kubectl-$TARGET_VERSION
 93 | 
 94 | if [ ! -f "$TARGET" ]; then
 95 |   curl -L -o "$TARGET" "https://storage.googleapis.com/kubernetes-release/release/$TARGET_VERSION/bin/$OS/$CPU_ARCHITECTURE/kubectl" > /dev/null 2>&1
 96 |   chmod +x "$TARGET"
 97 | fi
 98 | 
 99 | $TARGET "$@"
100 | 


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